/*
 * Copyright (C) 2024 Bytedance Ltd. and/or its affiliates
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.bytedance.blockframework.framework.performance

import android.os.Handler
import android.os.HandlerThread
import android.os.Looper

object Executor {

    const val BLOCK_WORK_THREAD_LABEL = "Block_WorkThread"

    @Volatile private lateinit var workHandler: Handler
    private val mainHandler = Handler(Looper.getMainLooper())

    fun work(): Handler {
        if (!::workHandler.isInitialized) {
            synchronized(this) {
                if (!::workHandler.isInitialized) {
                    val handlerThread = HandlerThread(BLOCK_WORK_THREAD_LABEL)
                    handlerThread.start()
                    workHandler = Handler(handlerThread.looper)
                }
            }
        }
        return workHandler
    }

    fun main(): Handler {
        return mainHandler
    }

    fun setWork(handler: Handler) {
        workHandler = handler
    }

    fun post(runnable: () -> Unit) {
        work().post(runnable)
    }
}